1 //===-- LegalizeTypes.h - Definition of the DAG Type Legalizer class ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the DAGTypeLegalizer class. This is a private interface
11 // shared between the code that implements the SelectionDAG::LegalizeTypes
14 //===----------------------------------------------------------------------===//
16 #ifndef SELECTIONDAG_LEGALIZETYPES_H
17 #define SELECTIONDAG_LEGALIZETYPES_H
19 #define DEBUG_TYPE "legalize-types"
20 #include "llvm/CodeGen/SelectionDAG.h"
21 #include "llvm/Target/TargetLowering.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/ADT/DenseSet.h"
24 #include "llvm/Support/Compiler.h"
25 #include "llvm/Support/Debug.h"
29 //===----------------------------------------------------------------------===//
30 /// DAGTypeLegalizer - This takes an arbitrary SelectionDAG as input and hacks
31 /// on it until only value types the target machine can handle are left. This
32 /// involves promoting small sizes to large sizes or splitting up large values
33 /// into small values.
35 class VISIBILITY_HIDDEN DAGTypeLegalizer {
39 // NodeIdFlags - This pass uses the NodeId on the SDNodes to hold information
40 // about the state of the node. The enum has all the values.
42 /// ReadyToProcess - All operands have been processed, so this node is ready
46 /// NewNode - This is a new node, not before seen, that was created in the
47 /// process of legalizing some other node.
50 /// Unanalyzed - This node's ID needs to be set to the number of its
51 /// unprocessed operands.
54 /// Processed - This is a node that has already been processed.
57 // 1+ - This is a node which has this many unprocessed operands.
61 Legal, // The target natively supports this type.
62 PromoteInteger, // Replace this integer type with a larger one.
63 ExpandInteger, // Split this integer type into two of half the size.
64 SoftenFloat, // Convert this float type to a same size integer type.
65 ExpandFloat, // Split this float type into two of half the size.
66 ScalarizeVector, // Replace this one-element vector with its element type.
67 SplitVector, // This vector type should be split into smaller vectors.
68 WidenVector // This vector type should be widened into a larger vector.
71 /// ValueTypeActions - This is a bitvector that contains two bits for each
72 /// simple value type, where the two bits correspond to the LegalizeAction
73 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
74 TargetLowering::ValueTypeActionImpl ValueTypeActions;
76 /// getTypeAction - Return how we should legalize values of this type.
77 LegalizeAction getTypeAction(MVT VT) const {
78 switch (ValueTypeActions.getTypeAction(VT)) {
80 assert(false && "Unknown legalize action!");
81 case TargetLowering::Legal:
83 case TargetLowering::Promote:
85 // 1) For integers, use a larger integer type (e.g. i8 -> i32).
86 // 2) For vectors, use a wider vector type (e.g. v3i32 -> v4i32).
88 return PromoteInteger;
91 case TargetLowering::Expand:
93 // 1) split scalar in half, 2) convert a float to an integer,
94 // 3) scalarize a single-element vector, 4) split a vector in two.
98 else if (VT.getSizeInBits() ==
99 TLI.getTypeToTransformTo(VT).getSizeInBits())
103 } else if (VT.getVectorNumElements() == 1) {
104 return ScalarizeVector;
111 /// isTypeLegal - Return true if this type is legal on this target.
112 bool isTypeLegal(MVT VT) const {
113 return ValueTypeActions.getTypeAction(VT) == TargetLowering::Legal;
116 /// IgnoreNodeResults - Pretend all of this node's results are legal.
117 /// FIXME: Remove once PR2957 is done.
118 bool IgnoreNodeResults(SDNode *N) const {
119 return N->getOpcode() == ISD::TargetConstant ||
120 IgnoredNodesResultsSet.count(N);
123 /// IgnoredNode - Set of nodes whose result don't need to be legal.
124 /// FIXME: Remove once PR2957 is done.
125 DenseSet<SDNode*> IgnoredNodesResultsSet;
127 /// PromotedIntegers - For integer nodes that are below legal width, this map
128 /// indicates what promoted value to use.
129 DenseMap<SDValue, SDValue> PromotedIntegers;
131 /// ExpandedIntegers - For integer nodes that need to be expanded this map
132 /// indicates which operands are the expanded version of the input.
133 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedIntegers;
135 /// SoftenedFloats - For floating point nodes converted to integers of
136 /// the same size, this map indicates the converted value to use.
137 DenseMap<SDValue, SDValue> SoftenedFloats;
139 /// ExpandedFloats - For float nodes that need to be expanded this map
140 /// indicates which operands are the expanded version of the input.
141 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedFloats;
143 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
144 /// scalar value of type 'ty' to use.
145 DenseMap<SDValue, SDValue> ScalarizedVectors;
147 /// SplitVectors - For nodes that need to be split this map indicates
148 /// which operands are the expanded version of the input.
149 DenseMap<SDValue, std::pair<SDValue, SDValue> > SplitVectors;
151 /// WidenedVectors - For vector nodes that need to be widened, indicates
152 /// the widened value to use.
153 DenseMap<SDValue, SDValue> WidenedVectors;
155 /// ReplacedValues - For values that have been replaced with another,
156 /// indicates the replacement value to use.
157 DenseMap<SDValue, SDValue> ReplacedValues;
159 /// Worklist - This defines a worklist of nodes to process. In order to be
160 /// pushed onto this worklist, all operands of a node must have already been
162 SmallVector<SDNode*, 128> Worklist;
165 explicit DAGTypeLegalizer(SelectionDAG &dag)
166 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
167 ValueTypeActions(TLI.getValueTypeActions()) {
168 assert(MVT::LAST_VALUETYPE <= 32 &&
169 "Too many value types for ValueTypeActions to hold!");
172 /// run - This is the main entry point for the type legalizer. This does a
173 /// top-down traversal of the dag, legalizing types as it goes. Returns
174 /// "true" if it made any changes.
177 void NoteDeletion(SDNode *Old, SDNode *New) {
180 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
181 ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
185 SDNode *AnalyzeNewNode(SDNode *N);
186 void AnalyzeNewValue(SDValue &Val);
187 void ExpungeNode(SDNode *N);
188 void PerformExpensiveChecks();
189 void RemapValue(SDValue &N);
192 SDValue BitConvertToInteger(SDValue Op);
193 SDValue CreateStackStoreLoad(SDValue Op, MVT DestVT);
194 bool CustomLowerResults(SDNode *N, MVT VT, bool LegalizeResult);
195 SDValue GetVectorElementPointer(SDValue VecPtr, MVT EltVT, SDValue Index);
196 SDValue JoinIntegers(SDValue Lo, SDValue Hi);
197 SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned);
198 SDValue MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
199 const SDValue *Ops, unsigned NumOps, bool isSigned,
201 SDValue PromoteTargetBoolean(SDValue Bool, MVT VT);
202 void ReplaceValueWith(SDValue From, SDValue To);
203 void ReplaceValueWithHelper(SDValue From, SDValue To);
204 void SetIgnoredNodeResult(SDNode* N);
205 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
206 void SplitInteger(SDValue Op, MVT LoVT, MVT HiVT,
207 SDValue &Lo, SDValue &Hi);
209 //===--------------------------------------------------------------------===//
210 // Integer Promotion Support: LegalizeIntegerTypes.cpp
211 //===--------------------------------------------------------------------===//
213 /// GetPromotedInteger - Given a processed operand Op which was promoted to a
214 /// larger integer type, this returns the promoted value. The low bits of the
215 /// promoted value corresponding to the original type are exactly equal to Op.
216 /// The extra bits contain rubbish, so the promoted value may need to be zero-
217 /// or sign-extended from the original type before it is usable (the helpers
218 /// SExtPromotedInteger and ZExtPromotedInteger can do this for you).
219 /// For example, if Op is an i16 and was promoted to an i32, then this method
220 /// returns an i32, the lower 16 bits of which coincide with Op, and the upper
221 /// 16 bits of which contain rubbish.
222 SDValue GetPromotedInteger(SDValue Op) {
223 SDValue &PromotedOp = PromotedIntegers[Op];
224 RemapValue(PromotedOp);
225 assert(PromotedOp.getNode() && "Operand wasn't promoted?");
228 void SetPromotedInteger(SDValue Op, SDValue Result);
230 /// SExtPromotedInteger - Get a promoted operand and sign extend it to the
232 SDValue SExtPromotedInteger(SDValue Op) {
233 MVT OldVT = Op.getValueType();
234 Op = GetPromotedInteger(Op);
235 return DAG.getNode(ISD::SIGN_EXTEND_INREG, Op.getValueType(), Op,
236 DAG.getValueType(OldVT));
239 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
241 SDValue ZExtPromotedInteger(SDValue Op) {
242 MVT OldVT = Op.getValueType();
243 Op = GetPromotedInteger(Op);
244 return DAG.getZeroExtendInReg(Op, OldVT);
247 // Integer Result Promotion.
248 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
249 SDValue PromoteIntRes_AssertSext(SDNode *N);
250 SDValue PromoteIntRes_AssertZext(SDNode *N);
251 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
252 SDValue PromoteIntRes_Atomic2(AtomicSDNode *N);
253 SDValue PromoteIntRes_BIT_CONVERT(SDNode *N);
254 SDValue PromoteIntRes_BSWAP(SDNode *N);
255 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
256 SDValue PromoteIntRes_Constant(SDNode *N);
257 SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N);
258 SDValue PromoteIntRes_CTLZ(SDNode *N);
259 SDValue PromoteIntRes_CTPOP(SDNode *N);
260 SDValue PromoteIntRes_CTTZ(SDNode *N);
261 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
262 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
263 SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
264 SDValue PromoteIntRes_LOAD(LoadSDNode *N);
265 SDValue PromoteIntRes_Overflow(SDNode *N);
266 SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo);
267 SDValue PromoteIntRes_SDIV(SDNode *N);
268 SDValue PromoteIntRes_SELECT(SDNode *N);
269 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
270 SDValue PromoteIntRes_SETCC(SDNode *N);
271 SDValue PromoteIntRes_SHL(SDNode *N);
272 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
273 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
274 SDValue PromoteIntRes_SRA(SDNode *N);
275 SDValue PromoteIntRes_SRL(SDNode *N);
276 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
277 SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo);
278 SDValue PromoteIntRes_UDIV(SDNode *N);
279 SDValue PromoteIntRes_UNDEF(SDNode *N);
280 SDValue PromoteIntRes_VAARG(SDNode *N);
281 SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo);
283 // Integer Operand Promotion.
284 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
285 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
286 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
287 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
288 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
289 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
290 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
291 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
292 SDValue PromoteIntOp_MEMBARRIER(SDNode *N);
293 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
294 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
295 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
296 SDValue PromoteIntOp_Shift(SDNode *N);
297 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
298 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
299 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
300 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
301 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
302 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
304 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
306 //===--------------------------------------------------------------------===//
307 // Integer Expansion Support: LegalizeIntegerTypes.cpp
308 //===--------------------------------------------------------------------===//
310 /// GetExpandedInteger - Given a processed operand Op which was expanded into
311 /// two integers of half the size, this returns the two halves. The low bits
312 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
313 /// For example, if Op is an i64 which was expanded into two i32's, then this
314 /// method returns the two i32's, with Lo being equal to the lower 32 bits of
315 /// Op, and Hi being equal to the upper 32 bits.
316 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
317 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
319 // Integer Result Expansion.
320 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
321 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
322 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
323 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
324 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
325 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
326 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
327 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
328 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
329 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
330 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
331 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
332 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
333 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
334 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
336 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
337 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
338 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
339 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
340 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
341 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
342 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
343 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
344 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
345 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
346 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
348 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
349 SDValue &Lo, SDValue &Hi);
350 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
352 // Integer Operand Expansion.
353 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
354 SDValue ExpandIntOp_BIT_CONVERT(SDNode *N);
355 SDValue ExpandIntOp_BR_CC(SDNode *N);
356 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
357 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
358 SDValue ExpandIntOp_SELECT_CC(SDNode *N);
359 SDValue ExpandIntOp_SETCC(SDNode *N);
360 SDValue ExpandIntOp_Shift(SDNode *N);
361 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
362 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
363 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
364 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
366 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
367 ISD::CondCode &CCCode, DebugLoc dl);
369 //===--------------------------------------------------------------------===//
370 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
371 //===--------------------------------------------------------------------===//
373 /// GetSoftenedFloat - Given a processed operand Op which was converted to an
374 /// integer of the same size, this returns the integer. The integer contains
375 /// exactly the same bits as Op - only the type changed. For example, if Op
376 /// is an f32 which was softened to an i32, then this method returns an i32,
377 /// the bits of which coincide with those of Op.
378 SDValue GetSoftenedFloat(SDValue Op) {
379 SDValue &SoftenedOp = SoftenedFloats[Op];
380 RemapValue(SoftenedOp);
381 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
384 void SetSoftenedFloat(SDValue Op, SDValue Result);
386 // Result Float to Integer Conversion.
387 void SoftenFloatResult(SDNode *N, unsigned OpNo);
388 SDValue SoftenFloatRes_BIT_CONVERT(SDNode *N);
389 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
390 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
391 SDValue SoftenFloatRes_FABS(SDNode *N);
392 SDValue SoftenFloatRes_FADD(SDNode *N);
393 SDValue SoftenFloatRes_FCEIL(SDNode *N);
394 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
395 SDValue SoftenFloatRes_FCOS(SDNode *N);
396 SDValue SoftenFloatRes_FDIV(SDNode *N);
397 SDValue SoftenFloatRes_FEXP(SDNode *N);
398 SDValue SoftenFloatRes_FEXP2(SDNode *N);
399 SDValue SoftenFloatRes_FFLOOR(SDNode *N);
400 SDValue SoftenFloatRes_FLOG(SDNode *N);
401 SDValue SoftenFloatRes_FLOG2(SDNode *N);
402 SDValue SoftenFloatRes_FLOG10(SDNode *N);
403 SDValue SoftenFloatRes_FMUL(SDNode *N);
404 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
405 SDValue SoftenFloatRes_FNEG(SDNode *N);
406 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
407 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
408 SDValue SoftenFloatRes_FPOW(SDNode *N);
409 SDValue SoftenFloatRes_FPOWI(SDNode *N);
410 SDValue SoftenFloatRes_FRINT(SDNode *N);
411 SDValue SoftenFloatRes_FSIN(SDNode *N);
412 SDValue SoftenFloatRes_FSQRT(SDNode *N);
413 SDValue SoftenFloatRes_FSUB(SDNode *N);
414 SDValue SoftenFloatRes_FTRUNC(SDNode *N);
415 SDValue SoftenFloatRes_LOAD(SDNode *N);
416 SDValue SoftenFloatRes_SELECT(SDNode *N);
417 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
418 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
420 // Operand Float to Integer Conversion.
421 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
422 SDValue SoftenFloatOp_BIT_CONVERT(SDNode *N);
423 SDValue SoftenFloatOp_BR_CC(SDNode *N);
424 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
425 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
426 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
427 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
428 SDValue SoftenFloatOp_SETCC(SDNode *N);
429 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
431 void SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
432 ISD::CondCode &CCCode, DebugLoc dl);
434 //===--------------------------------------------------------------------===//
435 // Float Expansion Support: LegalizeFloatTypes.cpp
436 //===--------------------------------------------------------------------===//
438 /// GetExpandedFloat - Given a processed operand Op which was expanded into
439 /// two floating point values of half the size, this returns the two halves.
440 /// The low bits of Op are exactly equal to the bits of Lo; the high bits
441 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
442 /// into two f64's, then this method returns the two f64's, with Lo being
443 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
444 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
445 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
447 // Float Result Expansion.
448 void ExpandFloatResult(SDNode *N, unsigned ResNo);
449 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
450 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
451 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
452 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
453 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
454 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
455 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
456 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
457 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
458 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
459 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
460 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
461 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
462 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
463 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
464 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
465 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
466 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
467 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
468 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
469 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
470 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
471 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
472 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
473 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
475 // Float Operand Expansion.
476 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
477 SDValue ExpandFloatOp_BR_CC(SDNode *N);
478 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
479 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
480 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
481 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
482 SDValue ExpandFloatOp_SETCC(SDNode *N);
483 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
485 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
486 ISD::CondCode &CCCode, DebugLoc dl);
488 //===--------------------------------------------------------------------===//
489 // Scalarization Support: LegalizeVectorTypes.cpp
490 //===--------------------------------------------------------------------===//
492 /// GetScalarizedVector - Given a processed one-element vector Op which was
493 /// scalarized to its element type, this returns the element. For example,
494 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
495 SDValue GetScalarizedVector(SDValue Op) {
496 SDValue &ScalarizedOp = ScalarizedVectors[Op];
497 RemapValue(ScalarizedOp);
498 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
501 void SetScalarizedVector(SDValue Op, SDValue Result);
503 // Vector Result Scalarization: <1 x ty> -> ty.
504 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
505 SDValue ScalarizeVecRes_BinOp(SDNode *N);
506 SDValue ScalarizeVecRes_ShiftOp(SDNode *N);
507 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
509 SDValue ScalarizeVecRes_BIT_CONVERT(SDNode *N);
510 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
511 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
512 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
513 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
514 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
515 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
516 SDValue ScalarizeVecRes_SELECT(SDNode *N);
517 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
518 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
519 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
520 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
522 // Vector Operand Scalarization: <1 x ty> -> ty.
523 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
524 SDValue ScalarizeVecOp_BIT_CONVERT(SDNode *N);
525 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
526 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
527 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
529 //===--------------------------------------------------------------------===//
530 // Vector Splitting Support: LegalizeVectorTypes.cpp
531 //===--------------------------------------------------------------------===//
533 /// GetSplitVector - Given a processed vector Op which was split into smaller
534 /// vectors, this method returns the smaller vectors. The first elements of
535 /// Op coincide with the elements of Lo; the remaining elements of Op coincide
536 /// with the elements of Hi: Op is what you would get by concatenating Lo and
537 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
538 /// this method returns the two v4i32's, with Lo corresponding to the first 4
539 /// elements of Op, and Hi to the last 4 elements.
540 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
541 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
543 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
544 void SplitVectorResult(SDNode *N, unsigned OpNo);
545 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
546 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
548 void SplitVecRes_BIT_CONVERT(SDNode *N, SDValue &Lo, SDValue &Hi);
549 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
550 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
551 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
552 void SplitVecRes_CONVERT_RNDSAT(SDNode *N, SDValue &Lo, SDValue &Hi);
553 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
554 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
555 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
556 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
557 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
558 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
559 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDValue &Lo, SDValue &Hi);
560 void SplitVecRes_VSETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
562 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
563 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
564 SDValue SplitVecOp_UnaryOp(SDNode *N);
566 SDValue SplitVecOp_BIT_CONVERT(SDNode *N);
567 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
568 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
569 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
570 SDValue SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
572 //===--------------------------------------------------------------------===//
573 // Vector Widening Support: LegalizeVectorTypes.cpp
574 //===--------------------------------------------------------------------===//
576 /// GetWidenedVector - Given a processed vector Op which was widened into a
577 /// larger vector, this method returns the larger vector. The elements of
578 /// the returned vector consist of the elements of Op followed by elements
579 /// containing rubbish. For example, if Op is a v2i32 that was widened to a
580 /// v4i32, then this method returns a v4i32 for which the first two elements
581 /// are the same as those of Op, while the last two elements contain rubbish.
582 SDValue GetWidenedVector(SDValue Op) {
583 SDValue &WidenedOp = WidenedVectors[Op];
584 RemapValue(WidenedOp);
585 assert(WidenedOp.getNode() && "Operand wasn't widened?");
588 void SetWidenedVector(SDValue Op, SDValue Result);
590 // Widen Vector Result Promotion.
591 void WidenVectorResult(SDNode *N, unsigned ResNo);
592 SDValue WidenVecRes_BIT_CONVERT(SDNode* N);
593 SDValue WidenVecRes_BUILD_VECTOR(SDNode* N);
594 SDValue WidenVecRes_CONCAT_VECTORS(SDNode* N);
595 SDValue WidenVecRes_CONVERT_RNDSAT(SDNode* N);
596 SDValue WidenVecRes_EXTRACT_SUBVECTOR(SDNode* N);
597 SDValue WidenVecRes_INSERT_VECTOR_ELT(SDNode* N);
598 SDValue WidenVecRes_LOAD(SDNode* N);
599 SDValue WidenVecRes_SCALAR_TO_VECTOR(SDNode* N);
600 SDValue WidenVecRes_SELECT(SDNode* N);
601 SDValue WidenVecRes_SELECT_CC(SDNode* N);
602 SDValue WidenVecRes_UNDEF(SDNode *N);
603 SDValue WidenVecRes_VECTOR_SHUFFLE(SDNode *N);
604 SDValue WidenVecRes_VSETCC(SDNode* N);
606 SDValue WidenVecRes_Binary(SDNode *N);
607 SDValue WidenVecRes_Convert(SDNode *N);
608 SDValue WidenVecRes_Shift(SDNode *N);
609 SDValue WidenVecRes_Unary(SDNode *N);
611 // Widen Vector Operand.
612 bool WidenVectorOperand(SDNode *N, unsigned ResNo);
613 SDValue WidenVecOp_BIT_CONVERT(SDNode *N);
614 SDValue WidenVecOp_CONCAT_VECTORS(SDNode *N);
615 SDValue WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
616 SDValue WidenVecOp_STORE(SDNode* N);
618 SDValue WidenVecOp_Convert(SDNode *N);
620 //===--------------------------------------------------------------------===//
621 // Vector Widening Utilities Support: LegalizeVectorTypes.cpp
622 //===--------------------------------------------------------------------===//
624 /// Helper genWidenVectorLoads - Helper function to generate a set of
625 /// loads to load a vector with a resulting wider type. It takes
626 /// ExtType: Extension type
627 /// LdChain: list of chains for the load we have generated.
628 /// Chain: incoming chain for the ld vector.
629 /// BasePtr: base pointer to load from.
630 /// SV: memory disambiguation source value.
631 /// SVOffset: memory disambiugation offset.
632 /// Alignment: alignment of the memory.
633 /// isVolatile: volatile load.
634 /// LdWidth: width of memory that we want to load.
635 /// ResType: the wider result result type for the resulting vector.
636 /// dl: DebugLoc to be applied to new nodes
637 SDValue GenWidenVectorLoads(SmallVector<SDValue, 16>& LdChain, SDValue Chain,
638 SDValue BasePtr, const Value *SV,
639 int SVOffset, unsigned Alignment,
640 bool isVolatile, unsigned LdWidth,
641 MVT ResType, DebugLoc dl);
643 /// Helper genWidenVectorStores - Helper function to generate a set of
644 /// stores to store a widen vector into non widen memory
646 /// StChain: list of chains for the stores we have generated
647 /// Chain: incoming chain for the ld vector
648 /// BasePtr: base pointer to load from
649 /// SV: memory disambiguation source value
650 /// SVOffset: memory disambiugation offset
651 /// Alignment: alignment of the memory
652 /// isVolatile: volatile lod
653 /// ValOp: value to store
654 /// StWidth: width of memory that we want to store
655 /// dl: DebugLoc to be applied to new nodes
656 void GenWidenVectorStores(SmallVector<SDValue, 16>& StChain, SDValue Chain,
657 SDValue BasePtr, const Value *SV,
658 int SVOffset, unsigned Alignment,
659 bool isVolatile, SDValue ValOp,
660 unsigned StWidth, DebugLoc dl);
662 /// Modifies a vector input (widen or narrows) to a vector of NVT. The
663 /// input vector must have the same element type as NVT.
664 SDValue ModifyToType(SDValue InOp, MVT WidenVT);
667 //===--------------------------------------------------------------------===//
668 // Generic Splitting: LegalizeTypesGeneric.cpp
669 //===--------------------------------------------------------------------===//
671 // Legalization methods which only use that the illegal type is split into two
672 // not necessarily identical types. As such they can be used for splitting
673 // vectors and expanding integers and floats.
675 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
676 if (Op.getValueType().isVector())
677 GetSplitVector(Op, Lo, Hi);
678 else if (Op.getValueType().isInteger())
679 GetExpandedInteger(Op, Lo, Hi);
681 GetExpandedFloat(Op, Lo, Hi);
684 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
685 /// which is split (or expanded) into two not necessarily identical pieces.
686 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
688 // Generic Result Splitting.
689 void SplitRes_MERGE_VALUES(SDNode *N, SDValue &Lo, SDValue &Hi);
690 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
691 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
692 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
694 //===--------------------------------------------------------------------===//
695 // Generic Expansion: LegalizeTypesGeneric.cpp
696 //===--------------------------------------------------------------------===//
698 // Legalization methods which only use that the illegal type is split into two
699 // identical types of half the size, and that the Lo/Hi part is stored first
700 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
701 // such they can be used for expanding integers and floats.
703 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
704 if (Op.getValueType().isInteger())
705 GetExpandedInteger(Op, Lo, Hi);
707 GetExpandedFloat(Op, Lo, Hi);
710 // Generic Result Expansion.
711 void ExpandRes_BIT_CONVERT (SDNode *N, SDValue &Lo, SDValue &Hi);
712 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
713 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
714 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
715 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
716 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
718 // Generic Operand Expansion.
719 SDValue ExpandOp_BIT_CONVERT (SDNode *N);
720 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
721 SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N);
722 SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N);
723 SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N);
724 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
727 } // end namespace llvm.